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DVB-TDVB-T2MDTV

ITU-R and GE06 Agreement

Ilham Ghazi

Radiocommunication Bureau

Overview

DVB-T DVB-T2 Comparison GE06 provisions for DVB-T2 Notification under article 5 of GE06 Conclusions

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DVB-T

DVB-T is a technical standard, developed by the DVB Project, that specifies the framing structure, channel coding and modulation for digital terrestrial television (DTT) broadcasting.

The first version of the standard was published in March 1997 and in the twelve years since then it has become the most widely adopted DTT system in the world.

It is a flexible system that allows networks to be designed for the delivery of a wide range of services, from HDTV to multichannel SDTV, fixed, portable, mobile, and even handheld reception.

In Region 1: GE06 agreement, for the Bands: 174-230 MHz, 470-862 MHz

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DVB-T2 2nd Generation Terrestrial: The first

version was published in 2009 DVB-T2 is the world’s most advanced

digital terrestrial television (DTT) system, offering more robustness, flexibility and at least 50% more efficiency than any other DTT system.

It supports SD, HD, mobile TV, or any combination.

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DVB-T 2 DVB-T2?

DVB-T DVB-T2

FEC (forward Error Correction)

Convolutional Coding + Reed Solomon 1/2, 2/3, 3/4, 5/6,7/8

LPDC+BCH 1/2 ,3/5, 2/3,3/4, 4/5, 5/6

Modes QPSK, 16QAM, 64QAM QPSK, 16QAM, 64QAM, 256QAM

Guard interval

1/4, 1/8, 1/16, 1/32 1/4, 19/256, 1/8, 19/128, 1/16, 1/32, 1/128

FFT size 2k, 8k 1k, 2k, 4k, 6k, 8k, 16k, 32k

Source: DigiTAG

Number of programs per multiplex for fixed reception with DVB-T 64-QAM-2/3-8K-GI 1/32 and DVB-T2-256-QAM-2/3-16K-GI 1/32

Source: EBU TECHNICAL REVIEW – 2009 Q4

Advantages of Digital TVFrequency saving!!

DVB-T/DVB-T2

DVB-T2 offers an increased efficiency of 30-50% in its use of spectrum compared to DVB-T.

DVB-T2 provides Data rates between 50% and 90% higher than DVB-T for the same level of robustness

DVB-T2 provides larger scale SFN than DVB-T

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DVB-T2 and G06 Agreement

Plan modification: Article 4 No possibility

Notification under article 5 of GE06: Conditions to respect according

to provision 5.1.3.

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WHY NOT POSSIBLE?GE06 Agreement: 3.1.1: The digital Plan consisting of two parts: the

174-230 MHz band and the 470-862 MHz band (comprising T‑DAB Plan assignments, T‑DAB Plan allotments, DVB‑T Plan assignments, DVB‑T Plan allotments).

3.2 Annex 2: Technical elements and criteria used in the development of the Plan and the implementation of the Agreement. Annex 2 , 1.1.1 Digital terrestrial television

broadcasting (DTTB): Digital television systems in the terrestrial broadcasting service which are described in Recommendation ITU‑R BT.1306-3. DVB-T (Terrestrial Digital Video Broadcasting) corresponds to the DVB system, which is designated as “System B”.

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Provision 5.1.3 5.1.3 A digital entry in the Plan may also be

notified with characteristics different from those appearing in the Plan, for transmissions in the broadcasting service or in other primary terrestrial services operating in conformity with the Radio Regulations, provided that the peak power density in any 4 kHz of the above-mentioned notified assignments shall not exceed the spectral power density in the same 4 kHz of the digital entry in the Plan. Such use shall not claim more protection than that afforded to the above-mentioned digital entry.

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Only assignments under 5.1.3 Rules of Procedure A10

1) Provision 5.1.3 deals with notification of a digital broadcasting entry in the Plan with characteristics different from those appearing in the Plan.

The definition of the “digital Plan entry”, as contained in No. 1.3.18 of Annex 1 to the GE06 Agreement, includes both assignments and allotments.

However, and in view of the formulation of No. 5.1 of the GE06 Agreement, the Board concluded that, in the application of No. 5.1.3 of the GE06 Agreement, administrations can notify only frequency assignments.

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Notification conditions5.1.3

Operating in conformity with the Radio Regulations.

the peak power density in any 4 kHz of the above-mentioned notified assignments shall not exceed the spectral power density in the same 4 kHz of the digital entry in the Plan.

not claiming more protection than afforded to the associated Plan entry.

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Rules of Procedure A10on 5.1.3

The Board decided that the verification of the 4kHz condition is only the first examination

If the examination of the peak power density is within the specified limits, then the Bureau will run the conformity examination (Section II of annex 4 of GE06 Agreement)

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No claim for more protection

The proposed notified assignment if successfully recorded in the Master Register (MIFR) with a favorable finding shall not claim more protection than that afforded to the digital Plan entry.

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Notification according to 5.1.3 Rules of Procedures - Partie A10

Notification1-GB1 notice

2- Provide all the

agreements (if Plan

remarks)3- All

conditions met

Entry recorded

in the Plan

Verification of the 4

kHz condition

Conditions of Section II of Annex 4

met

Record in the MIFR

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Notification of a DVB-T2 assignment stemmimg from a

DVB-T allotment

Submission under ART41-GT1 notice

(3C)

Check if:1- same channel 2- inside

the allotment

orwithin 20 km from

the allotment

Conditions of Section II of Annex

4 met

Converted entry

recorded in the Plan, If

in conformity

Record in the Plan

Notify Under 5.1.3

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How to notify Notices G02/GB1 must have:

t_pwr_dens : Maximum power density (dB(W/Hz)) averaged over the worst 4 kHz calculated for the maximum effective radiated power.

t_emi_cls : The class of emission of the assignment under treatment.

t_bdwdth : The necessary bandwidth of the system to be implemented (kHz)

Circular letter CR/286

GOOD NEWS

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DVB-T2 variants compatible with GE06

The 7 and 8 MHz variants of the system are compatible with the GE06 Agreement with respect to spectrum usage.

The 1.7 MHz variant is compatible with T-DAB frequency planning. (ITU-R Recommendation BT.1877).

The DVB-T2 implementation should apply the same level of filtering as that of the Plan entry to ensure that the out-of-band emissions are limited to the same level.

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GE06 compatible 7 MHz channel

DVB-T2 variantsModulation FFT size Code rate* Guard interval

QPSK or16-QAM or64-QAM or256-QAM

2k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/32, 1/16, 1/8, 1/4

4k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/32, 1/16, 1/8, 1/4

8k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128,1/4

16k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128, 1/4

32k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128

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* For block sizes of 16 200 and 64 800 bits

GE06 compatible 8 MHz channel DVB-T2 variants

Modulation FFT size Code rate* Guard intervalQPSK or16-QAM or64-QAM or256-QAM

2k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/32, 1/16, 1/8, 1/44k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/32, 1/16, 1/8, ¼8k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256,

1/8, 19/128, 1/4

16k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128, 1/4

32k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128

8k extended 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128, 1/4

16k extended 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128, 1/4

32k extended 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128

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* For block sizes of 16 200 and 64 800 bits

GE06 compatible 1.7 MHz block DVB-T2 variants

Modulation

FFT size Code rate* Guard interval

QPSK or16-QAM or64-QAM or256-QAM

1K 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/16, 1/8, 1/4

2k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/32, 1/16, 1/8, 1/4

4k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/32, 1/16, 1/8, 1/4

8k 1/2, 3/5, 2/3, 3/4, 4/5, 5/6 1/128, 1/32, 1/16, 19/256, 1/8, 19/128, 1/4

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* For block sizes of 16 200 and 64 800 bits

DVB-T2 variants not compatible with GE06

The DVB-T2 7 MHz extended carrier modes are not compatible with a DVB-T 7 MHz Plan entry if the required occupied bandwidth is compared with the GE06 DVB-T spectrum mask for 7 MHz.

Similarly, the variants with a 1k FFT for 7 and 8 MHz channels would be affected in a similar manner if the relevant filter GE06 DVB-T mask is applied.

DVB-T2 variants for 5 and 6 MHz channel arrangements may also be considered for the implementation of a GE06 Plan entry if suitable filtering is applied, however variants for these channel arrangements do not yet have defined spectrum shaping limits in the ETSI specification [EN 302 755] or in ITU-R Rec. BT.1877 [BT1877].

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Conclusions on 5.1.3

Normaly under 5.1.3, to be compatible: The DVB-T2 carrier modes can be using

equivalent or higher FFT, but not lower!  For protection: use a protection ratio less or

equal, and the minimum median FS equal or higher

than those relating to the DVB-T mode or RPC recorded in the Plan.

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Mobile reception in GE06

Mobile reception is defined as reception by a receiver in motion with an antenna situated at no less than 1.5 m above ground level. This could for example be a car receiver or handheld equipment.

- DVB-T with mobile reception mode

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Standard or Spec.

ModulationTransport stream

RF channel (MUX) size(MHz)

Int. Broadcast bands

Regional national origin

DVB-H QPSK or16-QAM COFDM

IP/MPE-FEC/ MPEG2 TS

8 IV and VRegion 1 (Europe)

T-DMB* DQPSK COFDM MPEG2 TS 1.75

III and 1.5 GHz

Region 3 (Rep. of Korea)

T2-lite QPSKH.264 8

IV and VRegion 1 (Europe)

Mobile digital broadcasting transport

mechanisms

*: Fully compatible with T-DAB

Mobile TV and GE06

Notification under 5.1.3:T-DMB: plan entry for T-DABDVB-H: plan entry for DVB-TT2 Lite: plan entry for DVB-T

Same procedure as for DVB-T2

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Thank you for your attention!

Ilham Ghazi

ITU/BR